| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
48
|
Mon Jul 18 14:29:07 2016 |
Gabriele | General | Daily Progress | Status of the test setup | I checked that the QPD electronics works
as expected, and that I can acquire the signals
using the ADCs. A new model (x3cr1) is up |
|
|
49
|
Mon Jul 18 17:46:04 2016 |
Gabriele | General | Daily Progress | First look at QPD signals | Here's the first spectrum of the QPD
X and Y signals, acquired with the digital
system. Roughing and turbo pumps are still |
|
|
51
|
Mon Jul 18 18:05:46 2016 |
Gabriele | Optics | Daily Progress | Optical setup | Small modifications to the optical setup:
added a 1m focal lenght
lens (AR coated for 1064nm...) right before |
|
|
52
|
Tue Jul 19 17:15:37 2016 |
Gabriele | Facility | Daily Progress | Vacuum pressure acquired | [Alena, Gabriele]
We connected the analog output
of the vacuum gauge controller to one of |
|
|
53
|
Tue Jul 19 17:21:48 2016 |
Gabriele | General | Daily Progress | First modes excited! | We can't generate any arbitary signal
with the real time model, since awg is not
working properly yet. For the moment being |
|
|
56
|
Thu Jul 21 12:10:14 2016 |
Gabriele | General | Daily Progress | Glitch hunting | Yesterday I could clearly see the glitches
as jumps in the time domain plot of X and
Y signals, and trace them to somewhat harder |
|
|
66
|
Wed Jul 27 15:43:02 2016 |
Gabriele | Facility | Daily Progress | Vacuum chamber dismantled and ready for cleaning | [Alena, Gabriele]
As decided at out Red Door meeting,
we're going to clean the vacuum chamber |
|
|
67
|
Thu Jul 28 13:58:48 2016 |
Alena, Gabriele | Clean | Daily Progress | The old chamber is now being cleaned and baked | Cleaned the chamber in the washing machine
at 40m and started 48 baking at 120 C |
|
|
68
|
Thu Jul 28 14:01:27 2016 |
Alena | General | Daily Progress | Clean room | Ordered the clean room (hardware+hepa filters)
and vacuum gauges |
|
|
69
|
Thu Jul 28 17:15:22 2016 |
Gabriele | Electronics | Daily Progress | ADC/DAC interfaces upgrade | Installed the ADC and DAC boards into a
proper box. Also, swapped the temporary DAC
board (with cale hack) with the final one. |
|
|
70
|
Fri Jul 29 14:08:31 2016 |
Gabriele | General | Daily Progress | Peak tracking code for real time model | Summary
I wrote a C function
to reconstruct the amlplitude and frequency
of a line. It can be added as a block into |
|
|
71
|
Mon Aug 1 16:56:57 2016 |
Gabriele | Electronics | Daily Progress | Populated four new QPD boards | Today I populated four more QPD boards.
All components are installed, except for
the QPD themselves. |
|
|
72
|
Tue Aug 2 15:58:12 2016 |
Gabriele | Electronics | Daily Progress | Six QPD functional and tested | I finished populating the new four QPD
boards, and fixed the first one I populated
weeks ago. I tested all five new boards: |
|
|
75
|
Wed Aug 10 09:39:38 2016 |
Gabriele | Electronics | Daily Progress | Annuntio vobis gaudium magnum: habemus Cymac | Yesterday I cloned the cymac2 disk and
installed it into the cymac3.
Jamie tweaked a few things (I can't |
|
|
76
|
Wed Aug 10 10:04:35 2016 |
Gabriele | Mechanics | Daily Progress | The prototype of the disk retain system is here | Yesterday we received the prototype of
the disk suspension and retain system. Everything
looks good. I checked that the disk fits |
6x |
|
81
|
Sat Aug 13 11:17:17 2016 |
Gabriele | Facility | Daily Progress | Spot the differences | |
|
|
82
|
Sat Aug 13 14:05:02 2016 |
Gabriele | General | Daily Progress | First work on the measurement user interface | Today I started programming part of the
user interface that will be used to perform
the measurements. Not much implemented so |
|
|
83
|
Sun Aug 14 11:40:29 2016 |
Gabriele | Electronics | Daily Progress | Some python code | Today I wrote some auxiliary functions
that will be useful for the measurement system:
noise.py: set of functions |
|
|
84
|
Sun Aug 14 18:13:52 2016 |
Gabriele | Electronics | Daily Progress | Progress on the user interface | Some progress on writing the user interface:
|
|
|
86
|
Tue Aug 16 11:53:30 2016 |
Alena, Gabriele | Clean | Daily Progress | Clean room progress | Some progress on the cleam room: bar fixed
to the wall, some more structure built, filters
in place. We had to (literally) work around |
|
|
88
|
Wed Aug 17 16:41:05 2016 |
Gabriele, Alena | Clean | Daily Progress | Clean room construction progress | The clean room frame is built and secured
to the floor and wall. Panels are being installed
on the ceiling and back. Also, the optical |
|
|
89
|
Thu Aug 18 18:15:18 2016 |
Gabriele, Alena | Clean | Daily Progress | Clean room construction progress | Ceiling, back and side panels are installed.
The air filters have been cabled and connected
to the power supply. |
|
|
90
|
Fri Aug 19 13:46:55 2016 |
Alena, Calum, Jon, Liz, Steve, Gabriele | Facility | Daily Progress | Clean room and vacuum complete | This morning we installed the clean room
curtains and washed them. It turns out that
the air filters are supposed to be powered |
|
|
91
|
Fri Aug 19 19:05:01 2016 |
Gabriele | Optics | Daily Progress | Disk installed into the chamber | I assembled the disk suspension sytem and
installed into the chamber. Although I don't
have the magnets and coils, I installed the |
10x |
|
92
|
Sat Aug 20 17:01:10 2016 |
Gabriele | General | Daily Progress | First ring down measurements | Everything is working pretty well. This
morning the pressure was about 1.2e-6 Torr.
I connected the high voltage amplifier and |
|
|
93
|
Sat Aug 20 22:18:26 2016 |
Gabriele | General | Daily Progress | First measured Qs | Using the first ring down of the day (GPS 1155754513
+ 3600 seconds), I computed the amplitude
of each of the modes already identified, |
22x |
|
94
|
Sun Aug 21 08:51:22 2016 |
Gabriele | General | Daily Progress | New disk installed | Vented the chamber. Installed a new disk
(MO 03). The one I measured yesterday is
now named MO 02 and it is the one with the |
|
|
95
|
Sun Aug 21 13:45:56 2016 |
Gabriele | Optics | Daily Progress | Wierd behavior of ring downs and Improved setup | The last two ring downs I measured today
showed a weird behavior of the lowest modes:
|
|
|
96
|
Sun Aug 21 15:36:16 2016 |
Gabriele | General | Daily Progress | New test | Roughing pump stopped at about 3:30:30pm.
HV amplifier on at 3:33:30pm, excitation
at 3:35:30pm. Recentered QPD at 3:36pm |
|
|
97
|
Sun Aug 21 17:16:03 2016 |
Gabriele | General | Daily Progress | Ring down measurement with new disk | After fixing the setup, the measurement
with the new disk looks great. After more
than one hour the first two modes are still |
22x |
|
98
|
Sun Aug 21 17:41:34 2016 |
Gabriele | General | Daily Progress | New test | I checked the status at about 5:20pm, the
turbo pump was in error and spinning down,
since the roughing pump has been off for |
|
|
99
|
Mon Aug 22 08:29:24 2016 |
Gabriele | General | Daily Progress | New test | Restarted roughing and turbo pump at about
8:10am.
|
|
|
101
|
Mon Aug 22 16:59:13 2016 |
Gabriele, Alastair | Optics | Daily Progress | Laser polishing of the disk edges | We set up a test facility for laser polishing
the disk edges, using the CO2 laser in the
TCS laboratory. We focused the beam with |
|
|
102
|
Tue Aug 23 08:46:04 2016 |
Gabriele | General | Daily Progress | Daily tests | MO03 - edge polished:
Turbo off, QPD centered, before
excitation (60 seconds) |
|
|
106
|
Sun Sep 11 10:05:33 2016 |
Gabriele | General | Daily Progress | New substrate in the chamber | I installed one of the new substrates (with
flats) into the chamber, and started the
pumpdown at about 9:45am LT. |
|
|
107
|
Mon Sep 12 16:00:06 2016 |
Gabriele | General | Daily Progress | First fully automated measurements of ring down | I finished the first version of the automation
software to measure the ring down of the
disk modes. I tested it with the new substrate |
|
|
116
|
Tue Sep 20 15:34:00 2016 |
Gabriele | Optics | Daily Progress | Improved optical lever layout | Goal
Improve the optical setup,
by increasing the response of the QPD to
disk motion. |
|
|
124
|
Fri Sep 23 08:11:48 2016 |
Gabriele | Mechanics | Daily Progress | Test of the disk retaining ring motion | In brief, it doesn't work. The magnets
and coils are strong enough to push up the
ring with a sample inside, but the friction |
|
|
127
|
Mon Sep 26 15:59:09 2016 |
Gabriele | Optics | Daily Progress | QPD auto centering | We have a few motorized mounts (with New
Focus picomotors) and one controller (an
old New Focus 8753, six axis total) that |
|
|
140
|
Thu Oct 20 14:38:24 2016 |
Gabriele | Clean | Daily Progress | Cleaning of S1600433 and S1600438 | Samples #433 (annealed and cleaned) and
#438 (as received from Mark Optics) are now
with GariLynn for deep cleaning. |
|
|
189
|
Tue Nov 15 10:35:11 2016 |
Gabriele | Mechanics | Daily Progress | Parts for laser polishing setup are here | The parts all fit as expected. They're
mounted on the stages.
|
|
|
192
|
Wed Nov 16 09:43:25 2016 |
Gabriele, Alastair | General | Daily Progress | CO2 laser polishing setup | Yesterday we assembled the lase polishing
system. The Co2 laser power can be controlled
using a waveplate, so we can turn on the |
|
|
256
|
Fri Jan 6 12:19:22 2017 |
Alena, Bob, Stephen and Calum | General | Daily Progress | Second vacuum chamber | Cleaning and baking (200 C air foe SS and
120 for Al) parts for the new vacuum chamber
|
|
|
270
|
Fri Jan 20 17:20:20 2017 |
Gabriele | Optics | Daily Progress | Input part of the optical lever setup installed and aligned | Today I installed and aligned part of the
optical components for the optical lever
of the new setup. For the moment being I |
|
|
272
|
Mon Jan 23 16:29:52 2017 |
Gabriele | Optics | Daily Progress | Input part of the optical lever setup installed and aligned | Today I cabled and installed the four QPD,
in a temporary position. I also assembled
four picomotor mounts that will be used for |
|
|
276
|
Wed Jan 25 10:02:23 2017 |
Gabriele | Electronics | Daily Progress | High voltage system in place | This morning I installed in the clean room
the high voltage amplifier and the high voltage
relays. Everything is cabled as planned. |
|
|
277
|
Wed Jan 25 16:12:05 2017 |
Gabriele | General | Daily Progress | Some assembly |
assembled the four in-vacuum periscopes
(no mirrors yet)
soldered kapton
wires to the four ESD board; the vacuum side |
|
|
278
|
Thu Jan 26 17:06:59 2017 |
Gabriele | General | Daily Progress | Four fold measurement system installation | Today I installed the four GeNS systems
into the chamber, connected the ESD to the
HV feedthrough and put the periscopes in |
|
|
280
|
Fri Jan 27 14:56:55 2017 |
Gabriele | Optics | Daily Progress | Optical lever setup completed | The four optical levers are completely
installed and aligned to a horizontal reference.
|
|
|
282
|
Mon Jan 30 15:16:54 2017 |
Gabriele | General | Daily Progress | Four samples in chamber |
checked that the high voltage paths
are working:
the DAC signal
is properly received and amplified by the |
|